Efficient automatic soil sampler for marine geological drilling

The invention discloses an efficient automatic soil sampler for marine geological drilling, and particularly relates to the technical field of soil sampling devices. A positioning seat; a sliding block; an elastic support sleeve; the pulling part is used for pulling the sliding block to slide upwards in the positioning seat, the elastic supporting sleeve comprises a cylindrical part and a conical part, four notch grooves are formed in the conical part, and a soil shoveling part is arranged at the lower end of the conical part. When the probe rod is put down, the soil shoveling parts on the elastic supporting sleeve can make contact with a slope of a seabed, then the elastic supporting sleeve is pulled by the pulling part to slide towards the probe rod, during sliding, the conical part retracts into the positioning seat, and in the retracting process, the four soil shoveling parts are relatively close to each other, so that soil on the slope can be shoveled, and the shoveled soil is collected in the elastic su